Juniper QFX3000-G QFabric, Deployment Manual, Page: 210 / 652

A QFX3008-I Interconnect device receives additional grounding when you
plug the power supply in the device into a grounded AC power outlet by using
the AC power cord appropriate for your geographical location. See
“AC Power
Cord Specifications for a QFX3008-I Interconnect Device with Three-Phase
Delta Wiring Trays” on page 135
.
NOTE: Each wiring tray must be connected to a dedicated AC power source
outlet.
Before you begin to connect power to the device:
•
Ensure that you understand how to prevent ESD damage. See Prevention of Electrostatic
Discharge Damage .
• Ensure that a licensed electrician has prepared the power cords. See “Preparing Delta
and Wye Three-Phase Power Cords” on page 178 .
Ensure that you have the following parts and tools available to connect power to the
device:
•
Electrostatic discharge (ESD) grounding strap
• Phillips (+) screwdriver, number 1
• Slotted (–) screwdriver, 1/4 inch, with a torque range between 23 in-lb (2.6 Nm) and
25 in-lb (2.8 Nm)
CAUTION: You must use an appropriate torque-controlled tool to tighten
the screws on the terminal block. Applying excessive torque damages the
terminal block and the wiring tray. The absolute maximum torque that may
be applied to this screw is 50 in-lb (5.6 Nm).
WARNING: Ensure that the power cords do not block access to device
components or drape where people can trip on them.
To connect AC power to three-phase delta wiring trays:
1.
Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD
point on the chassis.
2.
Ensure that the power cords are not connected to power outlets. Switch off the
customer site circuit breakers. Ensure that the voltage across the AC power source is
0 V and that there is no chance that the voltage might become active during
installation.
Copyright © 2015, Juniper Networks, Inc. 184
QFX3000-G QFabric System Deployment Guide